气候变化领域集成服务门户(CCPortal): The non-linear relationship between the western North Pacific anticyclonic circulation and Korean summer precipitation on subseasonal timescales

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DOI	10.1007/s00382-019-05013-7
	The non-linear relationship between the western North Pacific anticyclonic circulation and Korean summer precipitation on subseasonal timescales
	Yeo S.-R.; Kwon M.H.; Lee J.-Y.
发表日期	2020
ISSN	0930-7575
起始页码	525
结束页码	541
卷号	54 期号:2020-01-02
英文摘要	It has been widely known that the pulse of the western North Pacific anticyclonic circulation (WNPAC) plays a key role on East Asian summer climate variability in subseasonal to interannual time scales. Yet, the relation between the WNPAC and summer precipitation over Korea is not robust on seasonal and subseasonal timescales for the recent few decades. Here, we show that the low correlation between WNPAC and Korean precipitation is attributable to their distinctive non-linear relationship and investigate detailed features in their four different phase relationships on subseasonal time scales. First, the positive Korean precipitation anomaly occurs as the part of zonally elongated precipitation band along with the positive WNPAC anomaly closely connected with the decaying phase of El Niño and Indian Ocean warming. The second case is enhanced Korean precipitation accompanying with negative WNPAC anomaly. In this case, the negative WNPAC anomaly constitutes a part of atmospheric wave train across the North Pacific and this feature is associated with the decaying phase of La Niña. The typhoon-related precipitation event also contributes to this case. Third, the negative Korean precipitation anomaly arises when the low-level easterly anomaly along with the northern flank of negative WNPAC anomaly leads to suppressed convective activity in Korea. Lastly, the negative Korean precipitation anomaly happens with the positive WNPAC anomaly when anomalous high covers entire East Asia and the WNP mainly during the decaying phase of central Pacific El Niño. The understanding of the non-linear relationship between WNPAC and Korean precipitation in this study provides better insight into the potential impacts of El Niño-Southern Oscillation and circulation/convection anomaly over the WNP on summer Korean precipitation. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	anticyclone; atmospheric circulation; atmospheric convection; atmospheric wave; El Nino-Southern Oscillation; precipitation (climatology); summer; timescale; Korea; Pacific Ocean; Pacific Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145755
作者单位	APEC Climate Center, Busan, South Korea; Korea Institute of Ocean Science and Technology, Busan, South Korea; Research Center for Climate Sciences and Department of Climate System, Pusan National University, Busan, South Korea; Center for Climate Physics Institute for Basic Science (IBS), Busan, South Korea
推荐引用方式 GB/T 7714	Yeo S.-R.,Kwon M.H.,Lee J.-Y.. The non-linear relationship between the western North Pacific anticyclonic circulation and Korean summer precipitation on subseasonal timescales[J],2020,54(2020-01-02).
APA	Yeo S.-R.,Kwon M.H.,&Lee J.-Y..(2020).The non-linear relationship between the western North Pacific anticyclonic circulation and Korean summer precipitation on subseasonal timescales.Climate Dynamics,54(2020-01-02).
MLA	Yeo S.-R.,et al."The non-linear relationship between the western North Pacific anticyclonic circulation and Korean summer precipitation on subseasonal timescales".Climate Dynamics 54.2020-01-02(2020).